1 definition by Gandolf Randolf

A common short form for "indicators of interest", which is a phrase commonly found on forums for dating advice. Mostly describing the behaviour of women when noticing guys (at a club/bar)

- At a club, guys go after the girls who show IOI's.
When scouting a party for chicks, go after the ones who show IOIs
by Gandolf Randolf August 09, 2006

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